Int 10 Fn BF03  - Video - Compaq Extensions - Get Environment              [b]

   AX = BF03h
   BX = 0000h

Return: BH = active monitor
       (00h = external, 01h = internal, 03h both, 04h neither)
   BL = master mode (see #0143)
   CH = ASIC type and version
       00h (reserved, very early Compaq VGCs)
       31h if QVision VGA
   CL = switchable VDU modes supported (see #0144)
   DH = internal monitor type (see #0145)
   DL = external monitor type (see #0145)

See Also: AX=1A00h,AX=BF00h,AX=BF01h,AX=BF02h,AX=BF11h

(Table 0143)
Values for Compaq video master mode:
 00h   switchable VDU not present
 04h   CGA
 05h   EGA
 07h   MDA
 08h   switchable LCD controller present
 09h   plasma VGA
 0Ah   TFT (active-matrix) VGA

Bitfields for Compaq switchable VDU modes support:
Bit(s) Description (Table 0144)
 0 CGA supported
 1,2   reserved (1)
 3 MDA supported
 4 BitBLT engine available
 5 132-column support availble
 6 640x480x256 mode available
 7 8-bit DAC mode available

(Table 0145)
Values for Compaq monitor type:
 00h   none
 01h   dual-mode monitor
 02h   5153 RGB monitor (RGBI 16-color)
 03h   Compaq Color monitor
 04h   640x400 flat panel (Plasma CGA)
 05h   VGC monochrome
 06h   VGC color
 07h   8-level mono LCD VGA (internal)
   1024x768 mono VGA (external)
 08h   16-level mono plasma VGA (internal)
   1024x768 color VGA (external)
 09h   4-level mono LCD CGA
 0Ah   16-level mono LCD VGA
 0Bh   active-matrix color VGA
 0Ch   active-matrix mono VGA
 0Dh   STN color VGA